The f-block elements.
Lanthanides and actinides!
Lanthanides and actinides!
The bottom section of the periodic table is for the lanthanides and actinides, which are also known as the inner transition metals. These elements are placed below the main body of the periodic table to keep it compact, as they would otherwise disrupt the table's organization.
The other transtion metals. They are called Lathanoids and Anthanoids I believe. They are moved out of order so that all the elements could fit on one page.
Two rows of elements called the "LANTHANIDES" and the "ACTINIDES".
The two rows of metals that appear at the bottom of the periodic table are the lanthanides and actinides. They are known as the inner transition metals and are placed below the main body of the periodic table to keep the table size manageable.
Two rows of elements called the "LANTHANIDES" and the "ACTINIDES".
If the Lanthanoids and Actinoids were included in the main part of the periodic table, then the table would appear to be much wider.See:http://en.wikipedia.org/wiki/Periodic_table_(wide)These are relatively rare substances, not commonly found around most ordinary chemistry labs. By separating them, it makes the periodic table more compact & more readable.
The periodic table of elements is a chart that organizes the elements and emphasizes their shared traits and commonalities. All the known elements and their atomic number are on the periodic table.
The two sets of elements found below the Periodic Table are the Lanthanides and the Actinides, which are also known as the Inner Transition Elements. They are placed separately at the bottom of the Periodic Table to keep the table compact and organized.
Light gases on the periodic table include hydrogen (H) and helium (He), which have low atomic masses and are found in the first two groups of the table. Heavy gases include xenon (Xe) and radon (Rn) which have higher atomic masses and are found towards the bottom of the table in group 18.
I think its sulfer.Thats what I keep researching about.